The Lean Startup is about a scientific approach to managing startups/entrepreneurs.

It is recommended that anyone working in a startup stop whatever they are doing, and spent the next 24 hours to complete the book.

I will be summarizing some great concepts that I have learnt.

Heroku has a good getting started guide with Scala.

If you know the basic of Heroku, and has started with Typesafe’s Scala + Play! framework, there is 1 more thing you should to know.

You should know how to properly configure your local development environment.

This post is a tutorial guide for Java programmers who want to learn Scala.

I myself have programmed in Java for many years, yet jumping straight into Scala has made me clueless, and so I started to read some baby steps to learn the new language.

The following post is what I have learnt.

The installation guide for GHUnit is for installing the framework in the traditional way.

As you might know, CocoaPods is the new way to handle dependencies. Of course, GHUnit is supported.

The is a lack of a guide on how you setup the two useful iOS libraries together.

I was using SenTestingKit, the default unit testing framework from Apple, when I found out that it does not support tests that involve asynchronous methods, or blocks.

That’s a waste.

iOS 6 has introduced a big change to how App Store works.

The changes means a lot to developers, and affects how developers would write their app descriptions, screenshots, etc.

Some of the changes are so breaking, that lightwoodgames said – don’t just put up with this!.

You could also refer to a simple cheatsheet.

Here’s my short version of what you should take note of:

CocoaPods is a tool for managing dependecies for iOS and Mac OS X projects.

Getting started with using CocoaPods is easy. The tricky part is getting used to opening Xcode workspace (eg. App.xcworkspace) instead of Xocde project. But that’s not what I want to covered in this post.

One of the hurdle I encountered is getting unit testing to work after CocoaPods is setup.

I encountered a problem when I did a rake deploy. Somehow it does not get deployed.

The only error I got was:

The following paths are ignored by one of your .gitignore files:
_deploy

The singleton pattern is widely used in iOS to have a global, static class.

The most famous is [NSUserDefaults standardUserDefaults].

Over the years, the template for creating a singleton/SharedInstance has also changed. This is due to the introduction of new technologies in Apple’s SDK, particularly ARC and GDC.

If you are designing an SDK/library/API, read these 25 rules by Matt Gemmell: